Heating-furnace.



C, w. LUMMiS. HEATING FURNACE. APPLICATION FILED APILZI'. 1.9M.

PatentedSeptQ 24,1918.

I Ill I I I I! h u I on u 1517 7 31,

UNITED sTATEs PATENT curios.

/ i CHARLES W. LUMMIS, OF WORCESTER, MASSACHUSETTS, ASSIGNOR T MORGAN CONSTRUCTION COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION 01 MASSACHUSETTS.

HEATING-FURNACE.

To all whom it-may concern:

Be it known that I, CHARLES W. LUMMIS, a citizen of the United States, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement'in Heating-Furnaces, of which the following, taken in connection with the accompanying drawings, is a specification.

- The present invention relates to a furnace, of the regenerative type, particularly adapted for the heating of a continuous row of billets-or metal bars, and also adaptable for the heating of other classes of articles, as will, hereinafter appear. It is an object of the present invention to providea furnace in which the products of combustion travel across the hearth and lengthwise of the billets progressivel advancing therethrough, rather than lengthwise of said hearth, as is the case in the ordinary type of continuous furnace. A further 0b ect resides in the provision of a preheating chamber for the billets to be heated, into which they are introduced prior to their entrance into the main heating chamber of the furnace. A still further object vcontemplates the provision of means for controlling the quantity of hot gases passing transversely across the main hearth, in order to adapt the furnace to the heating of billets of varying sizes and temperature reinvention.

quirements.

. The above objects, as well as others appearmg hereinafter are accomplished by the construction and arrangement of parts as hereinafter described, and pointed out in the annexed claims.

In the accompanying drawings, v

Figure 1 is a view 111 horizontal section, taken through the heatingv chamber of a furnace constructed in accordance withmy Fig. 2 is a vertical longitudinal sectional view of the furnace.

Fig. 3 is a vertical cross sectional view- Specification of Letters Patent. Patented Sept, 24, 1918, Application filed April 27, 1914. Seria1No.834,580.

charged through doors 7 provided in the side walls at the forward end of the furnace.

The furnace herein disclosed is designed for the use of producer gas and is of the regenerative type. To this end, duplicate sets of regenerative passages are provided,

which are alternately used for the admission of the combustible and air to form the fuel charge which is admitted to the heating chamber, and for the passage of the The billets, each of which extendsv products of combustion from said chamber to the stack.

Referring particularly to Fig. 3, there is shown a pair of gas passages 8, 8 extending longitudinally of the furnace along each side, and a pair of passages 9, 9, each of the latter adapted to furnish air to the combustible supplied by the interior adjacent gas passage. The passages 8, 8' and 9, 9' extend practically throughout the length of the furnace; each isprovided with checkerwork as is, usual in furnaces of this type; and each is provided with means adapted to communicate with the forward portion of the heating chamber 2.. Each gas passage 8, 8 has a series of spaced ports 12 leading upwardly therefrom and communicating with a longitudinal channel 13 extending along the side .Wall of the furnace and opening into the heating chamber 2. Each air passage 9, 9' has a series of spaced ports 14 leading to its respective channel 13in alternating relation to the ports 12 leading from the adjacent gas passage.

At the rear end of the furnace the passages8, 8' and 9, 9' are suitably connected to reversing valves 10, 10 in the manner ordinary in furnaces of the regenerative type. In one position of such valves, the gas passage 8 on one sideof the furnace supplies the fuel charge, the adjacent air passage 9 which would clog the passages 8 or 9 when continuously used as exhaust passages, be-

-eome cleared by the passage therethrough of fresh. gas and air.

l lu-thermore, ll will be apparent that work ota different clnlrarter from the billets which are progressively advanced through the heating chamber can be heated within the above described furnace. To this end I have provided doors Q-l in the front end wall of the furnace. adapted for boththe introdm-tion and witlulrawalof articles to be heated within the. main heating chamber 1:").

'FlltlOlXl'iltlOll of my t'urnace onthe regenerative principle not only contributes to the eflieiencv with which the. billets are heated. but: also promotes the rapid change in the temperature within the main heating chamber 15. whensueha change is desired.

same-into a plurality of similar passage ays, eaeh partition being spaced above the oor of said chamber. means for advancing a row oi billets through said ehambertransversely of said passageways. and means for directingproducts of combustion through said chamber longltmliually of said passageways.

In a heating furnace, a heating chamber,.means For dividing said heating chamber into a plurality of passageways l ring wholl above. the. tloorot said chamber, means for admitting products of combustion to each of said passageways at one end thereof, means for exhausting said products passageways and means ior advancing arow of billetst'rom the other ends of said transversely oi said passageways.

'3. In a heating furnace, a heating chamber, a plurality of depending partitions carrierl within said heating chamber,-each partition terminating shortof. the tlool'of said chamber, means for advancing a row of billets through said chamber beneath said partitions, and means for directing products of combustionthrough said chamber longitudinally of the; billets of said row.

r. In a heating furnace, a heating chamber. a plurality of depending partitions carried within said chamber, each partition being spaced above the floor of said chamber, means for advancing a row of billets through said chamber beneath said partitions. and means for directing products of combustion through said chamber across said row of billets.

5. In a heating furnace. a heating. chamber. means .for advancing a row ot' billets through said chamber, a plurality of partitions carried within said chamber to fdrxi; passageways above said billets, means for directing products of combustion through said passageways, and means for drawing a portion of said products of combustion through the heating chamber transversely to said passitgeways.

6. In a heating furnace, a heating chainber, a plurality of partitions depending "from the root of said chamber and spaced from the floor thereoflmeans for directing products of combustion through said chain ber longitudinally of said partitions, means 8G for advancing a row of billets through said chamber beneath said partitions, and means? for drawing products of combustion trans partitions beneath the lower v versely of said.

edges thereof.

Dated this 23rd day of April, 1914.

cHARLEs W. LUMMIS.

-' Witnessesi 1 Gno. KENNE Y, Jr. PENELOPE Commun on. 

